Calculators
Board Foot Calculator
Calculate board feet and cost for a list of lumber pieces from thickness, width, length, quantity and price per board foot.
- Runs in your browser
- Nothing uploaded
The tool
Enter your numbers below. Results update as you type, and nothing leaves your browser.
Everything you enter stays on your own machine. Nothing is sent to us or to anyone else, which you can confirm in your browser network tab.
What people use it for
- Buying hardwood for furniture
- Pricing a woodworking project
- Checking a lumber invoice
- Estimating timber volume
About this tool
What the Board Foot Calculator does
Hardwood and rough lumber is often priced by the board foot: a volume of 144 cubic inches, equal to a piece 1 inch thick, 12 inches wide and 12 inches long. Multiply thickness by width in inches and length in feet, then divide by 12.
It also works as a lumber board foot calculator.
Formula
- Board feet = thickness (in) × width (in) × length (ft) ÷ 12 × quantity
Worked example
Using the starting values in the calculator above:
| Input | Value |
|---|---|
| Lumber list | 3 entries |
| Result | Value |
|---|---|
| Total board feet | 47.33 |
| Total cost | $353 |
How to read the result
Rough lumber is priced on its nominal rough size; planing reduces the finished size, so order thicker stock than the final dimension.
Hardwood thickness is often quoted in quarters: 4/4 is 1 inch, 8/4 is 2 inches.
Quantities are estimates. Check product data sheets and local codes, and confirm with your supplier before ordering.
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Questions
Questions about this tool
The things clients actually want to know — costs, timelines, ownership and what happens after launch.
A volume of 144 cubic inches, such as 1 × 12 × 12 inches.
Multiply thickness and width in inches by length in feet, then divide by 12.
Usually not; construction lumber is sold per piece or linear foot, but board feet still measure volume.
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